Snag

noun
1.
a tree or part of a tree held fast in the bottom of a river, lake, etc., and forming an impediment or danger to navigation.
2.
a short, projecting stump, as of a branch broken or cut off.
3.
any sharp or rough projection.
4.
a jagged hole, tear, pull, or run in a fabric, as caused by catching on a sharp projection.
5.
any obstacle or impediment.
6.
a stump of a tooth or a projecting tooth; snaggletooth.
verb (used with object), snagged, snagging.
7.
to run or catch up on a snag.
8.
to damage by so doing.
9.
to obstruct or impede, as a snag does:
He snagged all my efforts.
10.
to grab; seize:
to snag the last piece of pie.
verb (used without object), snagged, snagging.
11.
to become entangled with some obstacle or hindrance.
12.
to become tangled:
This line snags every time I cast.
13.
(of a boat) to strike a snag.
14.
to form a snag.
noun
1.
a difficulty or disadvantage: the snag is that I have nothing suitable to wear
2.
a sharp protuberance, such as a tree stump
3.
a small loop or hole in a fabric caused by a sharp object
4.
(engineering) a projection that brings to a stop a sliding or rotating component
5.
(mainly US & Canadian) a tree stump in a riverbed that is dangerous to navigation
6.
(US & Canadian) a standing dead tree, esp one used as a perch by an eagle
7.
(pl) (Austral, slang) sausages
verb snags, snagging, snagged
8.
(transitive) to hinder or impede
9.
(transitive) to tear or catch (fabric)
10.
(intransitive) to develop a snag
11.
(intransitive) (mainly US & Canadian) (of a boat) to strike or be damaged by a snag
12.
(transitive) (mainly US & Canadian) to clear (a stretch of water) of snags
13.
(transitive) (US) to seize (an opportunity, benefit, etc)

bug
see: hit a snag